Brazing-furnace.



Painted Dec. n, |900.

No. 663,822. A

D. H. WATTS. BRAZING FUHNACE. 'Application lecioct. 17, IBSSJ @No Model.) 2 Sheets-Sheet l.

me wams PETERS co. PnoTuLrmov, WASHINGTON. n. c4,

No. 663,822. Patented Dec. Il, |900.

D. H. WATTS. Y BrzAzmGFuHNAcE.

(Application-filed Oct. 17, 1898.) (No Model.)

2 Sheets-Sheet 2.

THE Nonms Parana co.. Pno'raungo., wAsn-uNuToN. b. c.

UNITED STATES PATENT rFICE.

DAVID H. WATTS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO DAVID H. WATTS, J R., OF SAME PLACE.

BRAZlNG-FURNACE.

SPECIFICATION forming part of Letters Patent N o. 663,822, dated December 1 1, 1900.

Application filed October 17,l 1898. Serial No. 693,781. (No model.)

To all whom t may concern:

Be it known that I, DAVID H. WATTS, a citizen of the United States, residing in Philadelphia, Pennsylvania,have invented certain Improvements inBrazing-Furnaces,of which the following is a specification.

The object of my invention is to rapidly and thoroughly brazc a series of tubes at one operation. This object I accomplish by mount- Io ing a number of tubes side by side upon a carriage and subjecting them to the action of a flame from aseries of burners independently controlled, as fully described hereinafter.

In the accompanying drawings, Figure lis a longitudinal sectional view of my improved brazingefurnace. Fig. 2 is a transverse section on the line 2 2, Fig. 1. Fig. 3 is a section on the line 3 3, Fig. l. Fig. 4 is an enlarged View showing the action of the flame upon zo the tubes, and Fig. 5 is a perspective view of a portion of the carriage.

Heretofore in the manufacture of tubes for umbrella and parasol handles particularly the tubes have been bentinto form and their edges brazed together one at a time. Consequently the operation was slow and expensive. By my invention I bend the steel sheets in the form of tubes and then apply the brazing compound to the same, place a number of the 3o tubes on the carriage side by side, and pass them over a iialne from a series of burners.

The movement of the carriage is controlled by the operator, who can see that the tubes are thoroughly brazed, as the fiame is exposed to view at all times.

In the present instance A is a frame, on the table a of which are mounted the blocks B B of fire-brick, forming a passage b between them, and mounted on fire-bricks B is a block 4o B2 of lire-brick, extending over the space b, but at such a height as to allow for the free travel of the carriage'D over the space.

C is an air-cylinder connected by a pipe c to an air-pressure device, preferably an airpump, so that a constant pressure of air is maintained in the cylinder O. Extending from this cylinder are a series of valved pipes c', connected to the pipe e of the burner E by a flexible hose c2. This burner has a series 5o of nozzles e', which extend into the space o.' F is a gas-cylinder connected to a supply through the pipef, provided with a valve fl to cut off the supply of gas. The cylinder F has a series of valved pipes f2, which are connected to the extension e2 of the burner E by 55 a flexible hose f3, so that each of the series of burners E has au independent connection with both the chamber O and the gas-chamber F, and as each one of these connections is provided with a controlling-valve the quan- 6o tity of air and gas admitted to each burner can be controlled, so that an even flameis insured.

When it is wished to reduce the pressure of air in the several pipes, I provide an outlet-pipe c3 at the end of the chamber (l, and in this outlet-pipe is a valve c4. On opening this valve air under pressure will escape from the cylinder, and consequently reduce the pressure in all the tubes. The supply of gas 7o to the cylinder is controlled by the valve f.

Extending from each end of the table are stands H H", supported by suitable framework. On these stands are rails lt, which rest upon the tire-bricks B B, and adapted to the rails are the wheels d of the carriage D. This carriage D has a series of cross-bars cl, notched at their upper edges to receive the tubes to be brazed. At each end of the carriage is a cross-bar having holes, int-o which 8o the tubes are forced, so as to keep the tubes separated and in position to be properly brazed, with the seams uppermost.

Supported on the frame A is a hood A to carry off the waste products of combustion.

The brazing compound is first applied to the seams of the tubes to be brazed, and then the tubes are carefully placed on the carriage D, with their ends in the openings in the end cross-pieces, each tube resting in a 9o notch inthe eross-bars, so that `they will be separated one from another. The iiame is then regulated by the valves controlling the supply of air and gas, and if the iiame is uneven the independent valves are adjusted so that an even flame is produced throughout the width ofthe furnace. The carriage is then moved slowly through the iiame, and the tubes are subjected to the required heat and then slowly moved forward until the enroo tire series of tubes has been brazed, the operator moving the carriage by hand. The

ing the tube to be brazed and for feeding it longitudinally through the machine above the burner, with the seam uppermost, substantially as described.

2. The combination in a tube-brazing machine, of a series of burners,v air and gas pipes connected to said burners, anda valve for each air and gas pipe, a carriage arranged to travel over the burners, and means for supporting a series of tubes longitudinally arranged on the carriage with their seams u ppei-most, substantially as described.

' 3. The combination in a tube-brazing furnace, of a frame, a series ot' independent burners mounted side by side on said frame and having air and gas inlets, a cylinder for air under pressure, a series of pipes projecting from said cylinder and connected to the air-inletsof each burner, valves for controlling the passage of air through the several pipes, a gas-chamber having a series of pipes connected to the series of gas-inlets of the burners, and valves controlling the passage of gas through the pipes whereby the Haine from each burner can be regulated, and a carriage so arranged as to support a series of tubes side by side, so that they can be traversed over the burners, substantially as described.

It. The combination in a tube-brazing furnace, of a frame, a seriesy of independent burners mounted side by side on said frame, a gas-cylinder and an air-cylinder connected to the burners, controllingvalves for each connection, so as to regulate the supply of air and gas to the independent burners, an air-supply pipe and a valved air-exhaust pipe communicating with the air-cylinder, and means for feeding the tubes longitudinally through the dames from the burners, substantially as described.

5. The combination of a frame having a table, tire-brick blocks mounted on the table and forming a space, a cover-block of rebrick bridging over the space between the other blocks. of re-brick, a series of burners projecting into the space between the rebricks, an air-cylinder and a gas-cylinder each connected to the several independent burners, stands at eac-h end of the frame, tracks on the said stands, and a carriage mounted on the tracks and arranged to carry a series of tubes to be brazed, substantially as described.

6. The combination in a tube-brazing furnace, of the frame, a series of burners arranged side by side across the frame, gas and air chambers connected to the independent burners, tracks on the frame and a carriage constructed to travel on the tracks, and notched cross-bars on the carriage constructed to receive and separate the series of tubes to be brazed, saidnotches being so arranged that the tubes'resting therein will be made to travel longitudinally above the burners as the carriage is moved.

'7. The combination in a tube-brazing furnace, of the burners, a carriage arranged to travel through the flame of the burners and having notched cross-bars and an end crossbar perforated to receive the tubes to be brazed, substantially as and for the purpose set forth. f

In testimony whereof I have signed my name to this specication in the presence of two subscribing witnesses.

DAVID H. WATTS.

Witnesses:

JNO. W. GRIFFIN, HORACE A. REEVES. 

